The actual cause of crash in previous commit 80f70ff6 is
Document::recompute() allows aborting using Base::Sequence, which
uses QApplication::processEvent() to catch 'ESC' key press. This local
event loop causes premature deletion of the editor widget.
This patch moves handling of closeEditor before calling recompute().
Crash stack trace
https://forum.freecadweb.org/viewtopic.php?f=8&t=37757&e=1&view=unread#p327901
It appears to by caused by handling QAbstractItemDelegate::closeEditor
signal twice. Once inside PropertyItemDelegate::editorClosed via slot
connection where the editor is closed/destroyed, the other in
PropertyEditor::closeEditor() which tries to access the destroyed
editor.
This patch removes handling of closeEditor signal in
PropertyItemDelegate.
* Display property from linked object, colored green,
* Change DlgPropertyLink to support external linking and sub-object
selection
* Improve large selection performance by using a timer
* Improve TAB key behavior in property editor
* Add context menu to show hidden properties, change property status,
set expression on any and property, and add/remove dynamic properties
* Optimize expression completer model construction, as the original
implementation gets prohibitively slow for moderate number of objects.
